<template>
  <view>
    <view class="goods-list">
      <!-- block不支持绑定click事件 -->
      <view v-for="(goods,i) in goodsList" :key="i" @click="gotoDetail(goods)">
        <my-goods :goods="goods"></my-goods>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        //请求参数对象
        queryObj: {
          query: '',
          cid: '',
          pagenum: 1,
          //每页展示的数据条数
          pagesize: 10
        },
        goodsList: [],
        total: 0,
        //节流阀
        isloading:false

      };
    },
    onLoad(options) {
      this.queryObj.query = options.query || ''
      this.queryObj.cid = options.cid || ''

      this.getGoodsList()
    },
    methods: {
      //获取商品列表数据的方法
      async getGoodsList(cb) {
        //打开节流阀
        this.isloading = true
        const {data: res} = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
        //关闭节流阀
        this.isloading = false
        //只要数据请求完毕，就立即按需调用cb回调函数，调用cb就会关闭下拉刷新的效果
        cb&&cb()
        if (res.meta.status !== 200) return uni.$showMsg()
        //为数据赋值：通过展开运算符的形式，进行新旧数据的拼接
        this.goodsList = [...this.goodsList,...res.message.goods]
        this.total = res.message.total
      },
      gotoDetail(goods){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id='+goods.goods_id
        })
      }
    },
    //上拉触底的事件
    onReachBottom(){
      if(this.queryObj.pagenum*this.queryObj.pagesize>=this.total) return uni.$showMsg('数据加载完毕！')
      if(this.isloading)return
      //让页码值自增加1
      this.queryObj.pagenum++
      //重新获取列表数据
      this.getGoodsList()
    },
    onPullDownRefresh(){
      //重置关键数据
      this.queryObj.pagenum=1
      this.total=0
      this.isloading=false
      this.goodsList=[]
      //重新发起数据请求,并关闭下拉刷新效果
      this.getGoodsList(()=>uni.stopPullDownRefresh())
    }
  }
</script>

<style lang="scss">

</style>
